Type CB

For the increased reduction of noise in circular ducts, galvanised sheet steel construction

Circular silencers made of galvanised sheet steel for the reduction of noise in circular ducts of air conditioning systems, with increased insertion loss due to sound absorbing pod

Absorption material is non-combustible mineral wool with RAL quality mark, biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC
Mineral wool faced with glass fibre fabric as protection against erosion, effective with airflow velocities up to 20 m/s
Casing, perforated inner duct and pod are galvanised sheet steel
Pod with domed end upstream to reduce the differential pressure
Variant with spigot has a groove for a lip seal, suitable for circular connecting ducts to EN 1506 or EN 13180
Insertion loss measured according to ISO 7235
Casing air leakage to EN 15727, class B

Optional equipment and accessories

With flanges on both ends
Lip seal

Application

Circular silencers Type CB for the reduction of air-regenerated noise in the circular ducts of air conditioning systems
For the reduction of air-regenerated noise
For the reduction of fan noise

Special characteristics

Insertion loss measured according to ISO 7235
Increased insertion loss due to sound absorbing pod
Pod with domed end upstream to reduce the differential pressure
Absorption material is non-combustible
Insulation thickness 50 mm or 100 mm

Variants

050: Circular silencer with 50 mm insulation
100: Circular silencer with 100 mm insulation
CB ../VF1: Circular silencer with flange on one end (end with domed cap)
CB ../VF2: Circular silencer with flanges on both ends
Special versions upon request

Parts and characteristics

Casing
Perforated inner duct
Sound absorbing pod

Accessories

Matching flange for one end
Matching flanges for both ends
Lip seals on both ends (factory fitted)

Construction features

Circular casing
Spigot suitable for circular ducts to EN 1506 or EN 13180
Spigot with groove for lip seal
Operating pressure up to 1000 Pa
Operating temperature up to 100 °C

Materials and surfaces

Casing, perforated inner duct and pod are galvanised sheet steel
Lining is mineral wool

Mineral wool

To EN 13501, fire rating class A2, non-combustible
RAL quality mark RAL-GZ 388
Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EG
Faced with glass fibre fabric as protection against erosion through airflow velocities of up to 20 m/s
Inert to fungal and bacterial growth

Información técnica

Circular silencers with sound absorbing pod for better acoustic performance, rigid construction, for air conditioning systems, available in 11 nominal sizes.

Insertion loss measured according to ISO 7235.

Casing with acoustic and thermal insulation.

Optimised differential pressure due to the sound-absorbing pod with domed end upstream.

Various types of connection, suitable for circular ducts to EN 1506 or EN 13180.

Casing air leakage to EN 15727, class B.

Special characteristics

Insertion loss measured according to ISO 7235
Increased insertion loss due to sound absorbing pod
Pod with domed end upstream to reduce the differential pressure
Absorption material is non-combustible
Insulation thickness 50 mm or 100 mm

Materials and surfaces

Casing, perforated inner duct and pod are galvanised sheet steel
Lining is mineral wool

Mineral wool

To EN 13501, fire rating class A2, non-combustible
RAL quality mark RAL-GZ 388
Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EG
Faced with glass fibre fabric as protection against erosion through airflow velocities of up to 20 m/s
Inert to fungal and bacterial growth

Technical data

Nominal sizes: 250 to 1000 mm
Operating pressure: 1000 Pa max.
Operating temperature: 100 °C max.

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